Nozzle for directing heated air to windshields



Jan. 13, 1948. G. R. WALLEN ET AL 2,434,340

NOZZLE FOR DIRECTING HEATED AIR TO WINDSHIELDS Original Filed Nov. 4,1944 we-u tow Geoibge R. Wzllem Her ertRflra' wsneck,

Patented Jan. 13, 194

oFFica NOZZLE Fort DIREC WIND TING HEATED AIR T0 SHIELDS of DelawareOriginal application November 4, 1944, Serial No.

Divided and this application Decem ber 19, 1945, Serial No. 635,855.

3 Claims. (01. 299-140) This invention relates to nozzles, particularlyfor directing heated air over window surfaces to remove frost and icetherefrom and to prevent the formation of frost and ice thereon, and hasfor its general object to provide, for these and analogous purposes, asimple, practical nozzle which is especially adapted for dispositionwith respect to a window or other surface to direct a layer of heatedair substantially uniformly over an extensive area thereof so as toaccomplish its purpose expeditiously and efllciently.

More particularly, the present invention relates to nozzles of the typeillustrated, described and claimed in our co-pending application,Serial- No. 562,027, filed November 4, 1944, of which the 1 presentapplication is a division, and has primarily in view to provide a nozzleof the type stated embodying a simple, practical construction wherebyatmospheric air is intermixed with the heated air to reduce thetemperature of the heated air in instances where the heated air may beso hot as possibly to harm windows of certain types.

With the foregoing and other objects in view, which will become morefully apparent as the nature of the invention is better understood, thesame consists in a. nozzle embodying the novel features of construction,combination and arrangement of parts as will be hereinafter more fullydescribed, illustrated in the accompanying drawings, and defined in theappended claims.

In the accompanying drawings, wherein like characters of referencedenote corresponding parts in the different views:

Figure 1 is a side elevation of a nozzle constructed in accordance withone practical embodiment of the invention.

Figure 2 is a front elevation of the nozzle.

Figure 3 is a, central, vertical, longitudinal sec-' tion through thenozzle; and

Figure 4 is a transverse section on the line 4-4 of Figure 3.

Referring to the drawings in detail, it will be observed that thepresent nozzle comprises an outer tubular'element l0 which is open atits 5 rear end for supply of heated air thereto and provided in its sidewall, intermediate its ends, with an arcuate slot II for discharge ofheated air fan-wise laterally therefrom. It will further be observedthat an inner tubular element l2 of 50 lesser diameter than the outertubular element l0 and open at its front end, is disposed within saidouter tubular element, coaxially therewith, and is connected at itsfront end to the front end of said outer tubular element by a wall l3,where- 2 by the space between said elements is closed at its front endagainst escape of heated air therefrom. It willadditionally be observedthat the inner tubular element 12 is closed at its rear end by a wall l4against entrance of heated air into the same from the outer tubularelement I0 and is provided in its side wall with an arcuate slot l5 forescape therefrom of atmospheric air which may enter the same through itsopen, front end.

The slot I5 is narrower than the slot H, but is co-extensive angularlytherewith and located in the central plane thereof. -.Extending acrossthe space between the tubular elements l0 and I2 at the sides of theslot l5 are walls l6, while extending across said space at the sides ofsaid slot are walls ll. Thus, between the walls ll is a narrow, arcuatepassageway or slot l8 which is open at its outerend and in communicationat its inner end with the interior of the inner tubular member i2through the slot 15. The side portions of the slot H are located toeither side ofthe passageway or slot l8, and the walls l6 and ll notonly prevent heated air from entering said passageway or slot from thetubular element H), but cause heated air to be discharged from saidtubular element It) through the side portions of the slot II in twonarrow, fan-like, separate parallel streams, one to either side of thepassageway or slot 18. These streams create a negative pressuretherebetween at the outer end of the passageway or slot [8 and therebyinduce flow of atmospheric air from the hollow element 12 through saidpassageway or slot l8 with the result that the atmospheric air becomesintermixed with and lowers the temperature of the discharged heated air.

The nozzle is intended to be mounted so that air discharged fan-wisetherefrom will be dispersed over a window surface for defrosting orIIOSt preventing purposes. In this connection, the heated air suppliedto the nozzle may be from a source of supply of heated air for otherpurposes and the air may be so hot as possibly to harm windows ofcertain types unless its temperature is reduced. For example, airplanesmay have a source of supply of heated air for cabin heating or otherpurposes and the air may be too hot to be directed safely againstlaminate or plastic windows with which the airplane may be equipped. IIn any such instance, the present nozzle affords a practical means ofreducing the temperature of the heated air and dispersing it 55 over awindow surface for defrosting or frost 3 preventing purposes withoutdanger of harming the window.

While the open. rear end of the tubular element ll may be connected inany suitable mannor with a source of supply of heated air. it preferredto provide. as a p f the 1101119. a hollow air supply head II to serveboth as a support for said element l and as a housing for valve means tocontrol supply of heated air to the nozzle.

While the head I! may be of any suitable design, it preferably is offiat, peripherally rounded form at one end and develops toward its otherend into a cylindrical neck for connection with a hot air supply duct.The element III is suitably Joined at its open. rear end to one fiatside of the first mentioned end of said head and in the said fiat sideof said head is an opening II for fiow of air from said head to saidelement I0.

In the head II is a valve in the form of a disk 22 for controlling fiowof heated air from said head to the tubular member ll. This valve is ofa size to cover the opening 2i and is pivotally mounted, as indicated at23, upon the front wall of the head I! for swinging movements betweenopen and closed positions relative to the open- {-ing 1| While anysuitable means may be provided for actuating the valve 22, snap actionmeans preferably is provided for this purpose. This means may comprise alever 24 pivoted intermediate its ends, as indicated at 26, to the rearwall of the head II and having its front end disposed within said headand its rear end disposed rearwardly of said head and provided with asuitable handle 28' for eifecting rocking movement thereof. The frontend of said lever may be connected by a link 21 with the valve 22 sothat by rocking said lever in one direction said valve is closed and byrocking said lever in the opposite direction said valve is opened.Moreover, a rod 2| may be pivoted tothe free end portion of the valve 22and may extend through an opening in a member 29 mounted within the headis, and an expansion helical spring 30 may surround said rod between thevalve and said member. The opening 29 may be located beyond the free endof the valve 21 at a point approximately midway between projections ofthe plane of the valve when it is in its open and its closed positions.Thus, if the valve is swung beyond its midway position toward either itsclosed or its open position, the spring 30 will act to snap it to andhold it in its closed or open position, as the case may be.

When the valve '22 is closed, flow of heated air to the tubular member Ill is denied and the nozzle is, of course, inoperative. When, however,the valve 22 is opened, as shown in Figure 3 of the drawings, heated airflows from the head is through the opening 2| into the tubular member l0and from the latter through the portions of the slot II to either sideof the passageway l8, thereby inducing flow of atmospheric air throughsaid passageway with the result that the atmospheric air becomesintermixed with and reduces the temperature of the heated air.

The nozzle may be mounted in any suitable manner at the side, bottom ortop of a window so that air delivered fan-wise from the nozzle will beprojected over the window substantially parallel thereto.

From the foregoing description considered in connection with theaccompanying drawings, it

is believed that the construction and operation of the present nonlewill be clearly understood and its advantages appreciated. it is desiredto point out, however, that while only a single. specific structuralembodiment of the invention has been illustrated and described. the sameis readily capable of various other specifically different structuralforms within its spirit and scope as defined in the appended claims.

We claim:

1. A nozzle comprising a tubular element open at its rear end for supplyof air thereto and having in its side wall and arcuate slot fordischarge of air therefrom. a smaller tubular element with in and spacedfrom said first mentioned tubular element and open at its front end forsupply of atmospheric air thereto, means closing the front end of thespace between said elements against escape of air therethrough from saidfirst mentioned element, means closing the rear end of said smallertubular element, said smaller tubular element having therein an arcuateslot substantially coextensive angularly with the slot in said firstmentioned tubular element, and walls extending outwardly from saidsecond mentioned tubular element at the sides and the ends of the slottherein across the space between said tubular elements to provide anelongated narrow-width passageway for atmospheric air communicating atits inner end with said second mentioned tubular element through theslot therein and open at its outer end for discharge of atmospheric airtherefrom, the outer portions of said walls being located between andbeing spaced from the sides of the slot in said first mentioned tubularelement so that air may be discharged from said first mentioned tubularelement through the slot therein to either side of the outer open end ofsaid passageway and thereby will act to draw atmospheric air throughsaid passageway for intermixture therewith.

2. A nozzle comprising a hollow cylindrical element open at its rear endfor supply of air thereto and having in its side wall an arcuate slotfor discharge of air therefrom, a smaller hollow cylindrical elementwithin and spaced from said first mentioned element and open at itsfront end for supply of atmospheric air thereto, means closing the frontend of the space between said elements against escape of airtherethrough from said first mentioned element. means closing the rearend of said smaller element, said smaller element having in its sidewall an archate slot substantially coextensive angularly with the slotin said first mentioned element, and walls extending from said secondmentioned element across the space between said elements at the sidesand ends of the slot in said smaller element and defining an arcuatepassageway communicating at its inner end with said smaller element andopen at its outer end for discharge of atmospheric air therefrom, theouter portions of said walls being located between and being spaced fromthe sides of the slot in said first mentioned element and having theirouter edges conforming substantially to the curvature of the side wallof said first mentioned element so that air may be discharged from saidfirst mentioned element through the slot therein to either side of theouter open end of said passageway and thereby will act to drawatmospheric air through said passageway for intermixture therewith.

3. A nozzle comprising a tubular element open at its rear end for supplyof air thereto and closed 5 at its outer end, said element having in itsside wall an arcuate slot for discharge of air therefrom, and meansproviding within said element an open ended atmospheric air passagewayex tending at one end through the outer end of said element and havingits other end portion of narrow-width arcuate shape and substantiallycoextensive angularly with said slot and disposed within and spaced fromthe sides of said slot so that air may be discharged from said tubularelement through said slot to either side of the said other end portionof said passageway and by its discharge will act to draw atmospheric airthrough said passageway for interm'iizture therewith.

GEORGE R. WALLEN.

HERBERT R. TRAUSNECK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 812,712 Woodhead Feb. 13, 19061,838,397 Heck Dec. 29, 1931 2,321,792 Bowie June 15, 1943

